While you're unlikely to get an all-expenses-paid trip unless you win a game show, you can still get portions your trip for free if you book certain promotions or take advantage of some alternative modes of travel. Here are my picks for top limited-time and long-term "free" travel deals worth checking out.

Kids Fly Free to French Polynesia

Never considered French Polynesia for family vacation? Maybe Air Tahiti Nui's kids-fly-free deal will persuade you. From now through the end of the year, when you book two adult Air Tahiti Nui fares from Los Angeles to French Polynesia, you'll get two free fares for kids ages 11 or younger. The deal is valid for flights to Papeete, Moorea, Huahine, Raiatea, Bora Bora, Rangiroa, Manihi, Tikehau, and Fakarava departing through December 10, 2008, or from January 12 to May 31, 2009. Adult fares start at $1,428, including all taxes. You'll still be responsible for paying taxes on the free children's fares.